<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
    <meta charset="UTF-8">
    <title>html格式的邮件 - 来自西游课堂</title>
</head>
<body>
    <h1 th:text="${username}">,欢迎来到西游课堂</h1>
</body>
</html>